Unit One Math Review

Rounding Decimals

100

7,423.816

Round this number to the nearest:

Ones:

Tenths:

Hundredths:

7,424

7,423.8

7,423.82

200

Mr. Niemi ran 1 mile in 55.7265 minutes. Round to the nearest

Tenths

Hundredths

Thousandths

Tenths: 55.7

Hundredths: 55.73

Thousandths: 55.727

300

Which of these represents 76.9352 to the nearest thousandths?

1. 76.93

2. 76.935

3. 76.936

4. 76.94

76.935

400

6,452.845

Round this number to the nearest:

Ones:

Tenths:

Hundredths:

The number rounds to 

6,453 (ones)

6,452.8 (tenths)

 6,452.85 (hundredths)

Exponents

100

Which of the following completes the equation below:

734,000 X 100 = 734 X _______

1. 10³

2. 10⁵

3. 10⁶

4. 10²

10⁵

Bonus points:

Show us how using a place value chart.

200

1. What value of n makes the equation true?

n X 10³ = 12,000

1. 12

2. 120

3. 1,200

4. 12,000

Show us using a place value chart

12

300

Which equation is correct?

1. 10² X 2 = 2,000

2. 10⁵ X 2 = 20,000

3. 10⁴ X 2 = 200,000

4. 10⁶ X 2 = 2,000,000

Show us using a place value chart.

10⁶ X 2 = 2,000,000

400

What is the value of the equation below?

400 X 10³

^{Use a place value chart.}

400,000

Place Value

100

In which number is the value of the 6 ten times greater than the value of the 6 in 360,745?

1. 498,456

2. 674,982

3. 158,634

4. 306,745

Show work using a place value chart!

674,982

200

134,574.47

Which place values does the 4 appear?

Thousands, ones, tenths

300

347,926.98

In which of the following numbers is the value of the digit 6 ten times greater than the value of the digit 6 in the number above?

1. 987,469.9

2. 870,756

3. 204,634.08

4. 9,204.67

987,469.9

400

Frank has some chickens. Frank has 10 times as many chickens as Gertrude. Which of the following can be the number of chickens they have?

1. Gertrude has 15 and Frank has 25

2. Gertrude has 180 and Frank has 18

3. Gertrude has 12 and Frank has 120.

4. Gertrude has 29 and Frank has 2,900

Gertrude has 12 and Frank has 120.

Number forms

100

In which of the following does the standard form and word form represent the same number?

1. 143.56; One hundred fifty seven and forty three hundredths.

2. 143.056; one hundred forty three and fifty six hundredths

3. 143.56; one hundred forty seven and fifty six hundredths

4. 143.06; one hundredths and six and one hundred forty three

143.056; one hundred forty three and fifty six hundredths

200

One hundred ninety two and thirty seven hundredths

Write this number in standard form.

192.37

300

SURPRISE EXPONENTS

Which of the following has a value of 10⁶

1. 10 X 10 X 10 X 10 X 10 + 10

2. 10 X 10 X 10 X 10 X 10 -  10

3. 10 X 10 X 10 X 10 X 10 X 10

4. 10 X 10 X 10 X 10 X 10

10 X 10 X 10 X 10 X 10 X 10

400

SURPRISE PLACE VALUE

Mr. Niemi wrote the following number on the board. 

2.976

He asked a student to write a number in which the value of the digit 9 is ten times larger. In which place should the student write the digit 9?

1. The ones place

2. The tenths place

3. The hundredths place

4. The thousandths place

The ones place